2010/09/30 by Jae-Hyeon Parq, Jae‐Hyeon Parq, Jaejun Yu +3 · 16 citations
Engineering · Materials Science · Physics and Astronomy · #Atom (system on chip) #Atomic physics #Bilayer graphene #Condensed matter physics #Electric field #Electron #Graphene #Graphene nanoribbons #Graphene research and applications #Materials science #Muon and positron interactions and applications #Nanotechnology #Physics #Quantum and electron transport phenomena #Scanning tunneling microscope #Scanning tunneling spectroscopy #Spin polarization #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevb.82.193406
published in Physical Review B 82(19) (American Physical Society) · 8 pages, 6 figures
openalex publication_date 2010/11/12 · arxiv created 2010/11/15 · arxiv updated 2010/11/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Metal atoms on graphene, when ionized, can act as a point-charge impurity to probe a charge response of graphene with the Dirac cone band structure. To understand the microscopic physics of the metal-atom-induced charge and spin polarization in graphene, we present scanning tunneling spectroscopy (STS) simulations based on density-functional theory calculations. We find that a Cs atom on graphene is fully ionized with a significant band-bending feature in the STS whereas the charge and magnetic states of Ba and La atoms on graphene appear to be complicated due to orbital hybridization and Coulomb interaction. By applying external electric field, we observe changes in charge donations and spin magnetic moments of the metal adsorbates on graphene.